Sometime this year I will move my rx7 from sea level to 6000ft, from Seattle to colorado springs, traveling through the mountains, probably going higher than the 6k ft to get there. does anyone think i will have to change my jetting, other than just adjusting with the mixture screws?

Currently my jetting setup:
Jetting for stock 12a
Main Emulsion Tube #7772.8
Main Fuel Jet #230
Main Air Jet #230
Idle Holder/Emulsion Tube #7850.4
Idle Jet #75
Accelerator Pump Jet #90
Needle and Seat #300

I was thinking that since the idle jets are really important to how well the dellorto 48 runs, i might have to change the idle jet to maybe a 70 or less. any ideas.

 

brought a car from San Deago to western Co. with a weber 48 on a 13b and went down one jet size on idle, idle adjustment will change also. weber and dells are simular and the idle jets are what you are running on at low cruise. pick up a set and change when it starts loding up at low cruise, it is also possible that it will start loading up on the mains too at higher power. a wide band is helpful as is a good tuner that knows dells. john

 

Makes sense, since the air is thinner once you get past about 8000 ft. in altitude (noticably
thinner I mean). Good to know.

 

thanks for the tip reo...i've had a aem uego..forgot to mention that...that's what helps me adjust my mixture screws...looks like i will get a set of each the main and idle a jet size lower.. so 70 on idle and 225 on the main fuel and air..

 

I'm reviving this from the dead, I'm moving from CA to CO, I can get the 70 and 65 on the idle jets and 225 on the main fuel from cbperformance but main air is not available only from dellorto, thoughts if this will work?